Malicious PDF — malware analysis report

Static analysis result for SHA-256 3328d4a5de339ffe…

MALICIOUS

PDF

72.2 KB Created: 2021-02-20 23:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eab1f54631182c392c8874484a2ff8b9 SHA-1: d8f11def9215021fa901dc5ebcc0de17265a7ade SHA-256: 3328d4a5de339ffebcf2fa6eed2c71a3c3605a494b2bfb4fe25e153a1c67b1f2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/wb?keyword=verbal%20reasoning%20practice%2011+ PDF link annotation
    • https://cdn.sqhk.co/vipabure/QkfgfTW/vivuzoruboxorapilegova.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/fojufufaz_xesuz_sulalafeki.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/VBnghby/7296782012.pdfIn PDF document text
    • http://biwuwevurax.22web.org/catecismo_de_westminster_comentado.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/bOifVGF/vatuzaxutovororaxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_6009c3e0cad44.pdfIn PDF document text
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/zulobowuv.pdfIn PDF document text
    • https://bubigijezifaju.weebly.com/uploads/1/3/1/3/131380429/8644852.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/ghxhd30/jamman_solo_looper_phrase_sampler.pdfIn PDF document text
    • https://cdn.sqhk.co/nalogigoke/qGhhjiy/pomejeselibiper.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ahiyJTf/mosal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_60161aaad5ce6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489422/normal_5fd88d18d7e60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livukuxuperum.epizy.com/fuviti.pdfIn PDF document text
    • http://vexukaxazixaxet.epizy.com/mobile_application_development_textbook_free.pdfIn PDF document text
    • http://lejaget.epizy.com/best_place_to_powerpoint_templates.pdfIn PDF document text
    • http://maguvotu.rf.gd/68321082486.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/calcolo_codice_fiscale_gratis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 5256 bytes
SHA-256: 8202df406edc8e86a444a7862f1b706d789ac2fbf1e40a9f8ba6b070838c35c7
font_01_sfnt_off0000f0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 10196 bytes
SHA-256: a56eb5d1605d11089e06c79a2227971b0fd8101a3d0c3b4d03552139a624c6ff

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